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The design guides of CMF continuous UF membrane
[The design parameters of CMF)/CUF ]
Note:At present,The water resource of CMF/CUF membrane are surface water and wastewater,the successful case is very little,in addition to the underground deep well water, but the Kaijie CMF/CUF membrane of RO pretreatment for all wastewater are very successful,the operation life is over 3 years, The reason is that the application of membrane and the function of membrane silks,The users put the CMF/CUF membrane as the universal membrane, don’t good control of pretreatment and water indicators,design flux is too big, dosing position of flocculant is not right, it is not reasonable that the frequency of on-line cleaning, the recoil pressure and agentia, don’t have elastic expansion function of X50/80 type membrane silks. Therefore, the CUF/CMF membrane must adopt the reasonable methods to resist pollution, membrane life of 30% lie in the membrane quality, the other 70% is whether the correct design and use (but membrane silks must have the expansion function).

Model

UF6040W

UF8040W

ESUF5050W

ESUF9040W

ESUF9050W


Performance

Initial flow25/m3/h

3.03.5

4.04.8

 2。4~3。0

5。6~6。7

6.5~8.0


Influent Water Turbidity

20NTU

50NTU


SDI & Turbidity

1.5 & 0。1NTU

1.5 & 0.1NTU


Specification

Mode

External pressure Type

External pressure Type/Internal diversion system


Membrane silk type

PP/

X50/80 highly elastic anti-pollution modified PP


MWCODalton

CMF:8~10 CUF:5~8

CMF:8~10 CUF:5~8 ten thousand


Membrane area

43m2

60m2

38m2

73m2

90m2


water resource type

Tap water, deep well water/

Tap water, surface water, waste water, waste acid alkali liquor, etc./Highly elastic anti-pollution


Inside diameter

Wall thickness

Inside diameter300350μm
Wall thickness
4560μm

Inside diameter370400μm,

Wall thickness5060μm


Conditions

Design flux of CUF/CMF

Tap water, deep well

1.3~1.6m3/h

1。72.1m3/h

0.91。3m3/h

2。2~2。7m3/h

2.6~3.2m3/h


Surface water

1。0~1。3m3/h

1.4~1.8m3/h

0。8~1。2m3/h

1.82。4m3/h

2。12.9m3/h


Waste water

0。8~1。0m3/h

1。1~1。4m3/h

0。7~0。8m3/h

1。55~1。9m3/h

1.92.3m3/h


Max Pressure

0.30Mpa

0。35Mpa

0.35Mpa


Max differential pressure

0.30Mpa

0。35Mpa

0。35Mpa


Residual chlorine concentration

100ppm

100ppm

100ppm


Lifetime

0。5~2 years(According to water quality)

Over 3 years

Over 3 years


Operation mode

Directly recycling

Directly recycling or circulating refluxDiversion system


PH

114

014

014


Circulating water producing water

Underground water 0.81 Surface water 1.21 Waste water,1.21

5040/9050 Underground water0.71 Surface water 11 Waste water 1.1


Online cleaning method

Water backwash with air scrubbing

Water backwashing with air scrubbing (Anti-pollution diversion system)


Process conditions

Backwash pressure

0~0.25MpaMax 0.30Mpa

0~0.25MpaMax 0。30Mpa

0~0.35Mpa


Backwash flow

Design flow

Deep well water1.5 timesSurface water 1.8timesWaste water 2。0times, Waste acid alkali, waste solvents 2。5times


Internal diversion system

No

YesElastic expansion function

Chemical agent

HCLNaOHNaClO/NaOH

HCLNaOHNaClO/NaOH


Note:
1.The above table,if without exact experiments and agreement of our company ,water flux must be designed according to the lower limit value.
2.CMF/CUF membrane are strict requirements for pretreatment and water indicators,Our company has a lot of experience with backwash pressure,water flow,frequency,reflux ratio,the way and position of using flocculant etc.If users need, please ask for CMF/CMF instructions to our company.
3.Our company recommends that users try to use KJ-ESUF9050 membrane element,not only price have advantage from the flux, but also the pipe valves, water pump, facilities can be greatly reduced. The internal diversion system can make the membrane cleaning cycle and service life can be greatly prolonged.

Detailed introduction of membrane 9050 type please click into
“The performance comparison and anti-pollution principle of KJ-UF and X50/80 elastic anti-pollution membrane,the patent of elastic membrane element” please click into
Manual Download of the CMF /CUF membrane of RO pretreatment please click into

[The structure of CMF membrane element]
Symbol description:
①The "wastewater inlet" can be the same as "gas scrubbing air inlet","Chemical cleaning fluid inlet "and “Auxiliary outfall”.
② The "Water outlet" can be the same as "backwash water inlet"
③ The"Wastewater reflux outlet" can be the same as the "outfall" and "chemical cleaning liquid reflux outlet"
④ "Backwash drainage outlet or be blocked "only as the“Backwash drainage outlet”and“be blocked”

[The directly reflow process of CMF/CUF membrane system]



Note:If there is a middle water tank between UF membrane system and pretreatment, generally choose the "directly reflow operation process",otherwise select the operation process of circulating pump.
“The detailed introduction of UF membrane”please click into